| 四乙烯五胺改性多孔二氧化硅制备及CO2吸附性能 |
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| 引用本文： | 杨小强,丁玉栋,李晓强,朱恂,王宏,廖强.四乙烯五胺改性多孔二氧化硅制备及CO2吸附性能[J].化工进展,2020,39(9):3511-3517. |
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| 作者姓名： | 杨小强 丁玉栋 李晓强 朱恂 王宏 廖强 |
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| 作者单位： | 1.重庆大学低品位能源利用技术及教育部重点实验室，重庆 400030;2.重庆大学工程热物理研究所，重庆 400030 |
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| 摘 要： | 以十六烷基三甲基溴化铵（CTAB）为模板剂，原硅酸乙酯（TEOS）为硅源，1,3,5-三异丙基苯（TPB）为扩孔剂，制备不同孔道结构的多孔二氧化硅纳米微球（PSNs），将四乙烯五胺（TEPA）通过物理浸渍法负载到PSNs上，合成TEPA-PSNs吸附剂。利用扫描电镜、透射电镜、红外光谱、N2吸附-脱附循环实验和热重分析对材料的结构性能和热稳定性能进行表征，成功制备了具有不同孔道结构的胺基化多孔二氧化硅。对吸附剂材料进行CO2吸脱附实验和动力学研究，结果表明：当TPB含量增多时，吸附剂材料吸附的CO2量也随之增大，并且TEPA-PSNs-0.5在75℃时吸附量最大，达4.70mmol/g；一阶动力学模型能较好地预测该吸附剂的CO2吸附过程；经过5次循环，其再生性能仍然高达94.34%。因此，合成的胺基化多孔二氧化硅具有高吸附量和良好稳定性，是用于二氧化碳捕集的潜在材料。
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| 关 键 词： | 二氧化硅 胺基功能化 再生性能 动力学 二氧化碳捕集 |
Preparation of TEPA-functionalized porous silica nanoparticles and its CO2 adsorption ability |
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| YANG Xiaoqiang,DING Yudong,LI Xiaoqiang,ZHU Xun,WANG Hong,LIAO Qiang.Preparation of TEPA-functionalized porous silica nanoparticles and its CO2 adsorption ability[J].Chemical Industry and Engineering Progress,2020,39(9):3511-3517. |
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| Authors: | YANG Xiaoqiang DING Yudong LI Xiaoqiang ZHU Xun WANG Hong LIAO Qiang |
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| Affiliation: | 1.Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Chongqing University, Chongqing 400030, China
2.Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China |
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| Abstract: | Porous silica nanoparticles (PSNs) with different pore structures were synthesized with cetyltrimethylammonium bromide (CTAB) as templates, tetraethoxysilane (TEOS) as silicon sources and 1,3,5-triisopropylbenzene (TPB) as pore expanding agent. TEPA-PSNs adsorbent was synthesized by physical impregnation, in which, the tetraethylpentamine (TEPA) was loaded onto the porous silica nanoparticles . The structural properties of the observed materials were characterized by SEM, TEM, FTIR and N2 adsorption-desorption cycling experiments. Its thermal stability was characterized by thermogravimetric analysis. It was found that TEPA-functionalized PSNs with different pore structures were prepared successfully. The experimental results of CO2 adsorption and desorption revealed that the amount of CO2 adsorbed by the adsorbent materials increased with the increase of the TPB amount. Moreover, TEPA-PSNs-0.5 had the highest adsorption capacity of 4.70mmol/g at 75℃. The pseudo-first-order kinetic model could well predict the CO2 adsorption process of the adsorbent. Its regenerative performance could reach 94.34% after 5 cycles. Therefore, the synthesized TEPA-functionalized porous silica had good stability and high CO2 adsorption capacity, which was a potential material for CO2 capture. |
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| Keywords: | silica amine functionalization regenerative performance kinetics CO2 capture |
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